How to verify password field in zend form?

Question

In my form, I'm trying to verify that the user fills in the same value both times (to make sure they didn't make a mistake). I think that's what Zend_Validate_Identical is for, but I'm not quite sure how to use it. Here's what I've got so far:

$this->addElement('password', 'password', array(
  'label'      => 'Password:',
  'required'   => true,
        'validators' => array(
            'Identical' => array(What do I put here?)
        )
    ));
$this->addElement('password', 'verifypassword', array(
  'label'      => 'Verify Password:',
  'required'   => true,
        'validators' => array(
            'Identical' => array(What do I put here?)
        )
    ));

Do I need it on both elements? What do I put in the array?

Answer 1

class My_Validate_PasswordConfirmation extends Zend_Validate_Abstract
{
const NOT_MATCH = 'notMatch';

protected $_messageTemplates = array(
    self::NOT_MATCH => 'Password confirmation does not match'
);

public function isValid($value, $context = null)
{
    $value = (string) $value;
    $this->_setValue($value);

    if (is_array($context)) {
        if (isset($context['password_confirm'])
            && ($value == $context['password_confirm']))
        {
            return true;
        }
    } elseif (is_string($context) && ($value == $context)) {
        return true;
    }

    $this->_error(self::NOT_MATCH);
    return false;
}
}

http://framework.zend.com/manual/en/zend.form.elements.html

Answer 2

I can't test it at the moment, but I think this might work:

$this->addElement('password', 'password', array(
    'label'      => 'Password:',
    'required'   => true
));
$this->addElement('password', 'verifypassword', array(
    'label'      => 'Verify Password:',
    'required'   => true,
    'validators' => array(
        array('identical', true, array('password'))
    )
));

Answer 3

I was able to get it to work with the following code:

In my form I add the Identical validator on the second element only:

$this->addElement('text', 'email', array(
  'label'      => 'Email address:',
  'required'   => true,
        'filters'    => array('StringTrim'),
        'validators' => array('EmailAddress')
    ));

$this->addElement('text', 'verify_email', array(
  'label'      => 'Verify Email:',
  'required'   => true,
        'filters'    => array('StringTrim'),
        'validators' => array('EmailAddress', 'Identical')
    ));

And in the controller, just before calling isValid():

$validator = $form->getElement('verify_email')->getValidator('identical');
$validator->setToken($this->_request->getPost('email'));

I don't know if there is a more elegant way of doing this without having to add this code to the controller. Let me know if there is a better way to do this.

Answer 4

$token = Zend_Controller_Front::getInstance()->getRequest()->getPost('password');
$confirmPassword->addValidator(new Zend_Validate_Identical(trim($token)))
                  ->addFilter(new Zend_Filter_StringTrim())
         ->isRequired();

Use the above code inside the class which extends zend_form.

Answer 5

With Zend Framework 1.10 the code needed to validate the equality of two fields using Zend Form and Zend Validate is:

    $form->addElement('PasswordTextBox',
                      'password',
                      array('label'      => 'Password')
                      );

    $form->addElement('PasswordTextBox',
                      'password_confirm',
                      array('label'      => 'Confirm password',
                            'validators' => array(array('Identical', false, 'password')),
                            )
                      );

You can notice, in the validators array of the password_confirm element, that the Identical validator is passed as array, the semantics of that array is: i) Validator name, ii) break chain on failure, iii) validator options As you can see, it's possible to pass the field name instead of retrieving the value.

Answer 6

FWIW support for comparing two identical form fields within a model was added to the 1.10.5 release. I wrote up a short tutorial on the matter, which you can access via the below link, but the bottom line is that the Zend_Validate_Identical validator has been refactored to accept a form field name as input. For instance, to compare the values of form fields pswd and confirm_pswd, you'll attach the validator to confirm_pswd like so:

$confirmPswd->addValidator('Identical', false, array('token' => 'pswd'));

Works like a charm.

See Validating Identical Passwords with the Zend Framework for a more complete example.